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vampyrsutton · 1 year

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Shinsou X Kami X Monoma~Double Penetration

Summary:

Monoma reads about hypnosis triggers and asks Shinsou to give him some. Somehow all of them forget they have a classmate whose quirk relies on sugar when picking trigger words.

Ao3 Tags:

Double Penetration in Two Holes, Kinktober, Kinktober 2021, Double Penetration in One Hole, Hypnotism, Consensual Mind Control, hypnosis triggers, a lot of cum, Deepthroating, Face-Fucking, Sex Toys, Quirk Shenanigans (My Hero Academia), Inappropriate Quirk Use, Quirk Kink (My Hero Academia), E-stim, electric stim, Threesome - M/M/M, Kaminari Denki Has ADHD

Notes:

Thank Horikoshi for a world where it's a bit easier to ignore human limits 🙏

“You sure you want to try this, Mon?” Shinsou asks for what has to be the millionth time.

Monoma just cocks an eyebrow, looking to Kaminari in question. “Was he like this with you, too?”

“Isolation does shit to you, man.” Denki just shrugs from where he’s playing on his phone.

‘Don’t I know it.’ Monoma sighs, looking back up at the purple-haired insomniac. “Yes, Shin. I’m sure.”

Shinsou sighs, deciding to stop beating around the bush. “Okay...Are you su-”

“Oh for fucks sake y-” Monoma’s mind clouds with static as he stares blankly into space.

“Good boy,” Shinsou smirks. “Now we just gotta program those triggers he wanted.” He hums as Kami shows him the list on his phone. “I’m surprised he actually wants one for chilling out.”

“Babe, that’s the one you put for your free space.” Denki laughs at his sleepy boyfriend. “Remember when you were half asleep last night?”

“Oh yeah. I’m just getting tired of having to be the one to reign in Bakugou whenever Kirishima is with Fat Gum.” Shinsou chuckles, taking the phone to look at the list better. “I think I know which one is your free spot.”

“The cooking one yeah. He makes really good ramen from scratch.” Denki hums as he now plays with a loose thread on his shirt.

Shinsou’s head snaps up as he blinks. “I thought it was the kinky one?”

Denki just smirks now. “Nope. That one was all him.”

Shinsou groans as he reads it again, already getting horny with the possibilities. “I think I know why Dad warned me against loud blondes now. You two are gonna be the death of me one of these days.”

“I can still ask Bakugou if you wanna add another~” Kaminari teases.

“I’m pretty sure Kirishima would kill me if you did. Those dating the other blondes are already suspicious enough.” Shinsou chuckles with a shrug. “Back to the triggers though. I think you should pick them since you’re the most likely to shout random words, and we don’t want to set him off without meaning to.”

Kaminari takes his phone back momentarily to type furiously. It dings a second later. I asked Kendou for a nickname to call her so she still knows to get him if we’re not around, she just doesn’t know it will also subdue him. Kenken can be his chill button.” Denki hums, handing the phone back.

Shinsou raises an eyebrow but gives the small blonde a proud smile. “Well, look who’s using their brain.”

Denki grins proudly as Shinsou programs the trigger, the lighter blonde nodding blankly. “How about Sweetie for the dirty one? No one here calls their S/O that so there shouldn’t be any accidents.”

“Sounds good.” Shinsou nods, programming it in. “Okay, next.”

They continued on until they made it through the list, adding a few small ones on the way to really only use if he got himself too worked up. Once they were done Shinsou released his quick and smirked as Monoma blinked at him in confusion.

The lighter blonde kind of looked himself over before tilting his head. “Should I feel any different?”

“Not really.” Denki is the one to answer. “You won’t unless someone uses one.”

“Hmm, okay I guess.” Monoma shrugs with a slight flush on his face as he looked away. “So...are we going to try any of them?”

The other two smirk at him wickedly.

“Nope.” Shinsou snickers. “Half the fun of that type of trigger is the anticipation.”

“Can I at least know what they are?” Monoma pouts.

Shinsou just tilts his head, smirk not leaving his face. “Nope cause the second you’re feeling bratty, you’ll goad someone into saying them.”

Monoma crosses his arms now but can’t deny it so just huffs. “Whatever. Let’s go, we’ve got joint training in like 15…” His eyes widen as he looks at his phone. “FIVE Minutes?! What the hell?”

“Calm down we’re right next to today’s training grounds.” Shinsou yawns. “I’ll just use my capture weapon to get us down there in time.”

Monoma’s eyes widen as he starts making a break for the door. “Hell no, you Spiderman wanna be! I saw you practicing with Tape Boy again and I rather liked today’s breakfast so-”

“Guava.”

Monoma freezes, unable to move. “I hate you sometimes.”

“No, you don’t.” Kaminari laughs as he pulls Monoma over to the window and their waiting boyfriend.

“I want a divorce.” Monoma huffs as he’s hoisted into Shinsou’s hold.

“At least let me put a ring on it, damn.” Shinsou deadpans, bursting out laughing at how red Monoma turns.

“Shut u-AHHHHHHH!” Monoma screams as Shinsou launches them out the window, Shinsou teasing him the entire time.

~~~

A few days go by since the triggers were added and between homework and training, the trio kind of forgets about them. It isn’t until the next Friday when they’re chilling in the Class 3-A commons that something happens to change that.

“I made treats!” Sato calls from the kitchen where he had finally managed to fight Bakugou out to let him bake. “Anyone want some?”

“Oh! What kind?” Kaminari jumps up from where he was previously draped across his boyfriends’ laps.

“Edible cookie dough! My cousin got ahold of the Sweetie recipe!” Sato grins, bringing a small paper cup out for the excited blonde.

Monoma, meanwhile, has to clamp a hand over his mouth as the reaction is immediate. As soon as he hears the word heat flashes through his system and his blood rushes south so fast he feels light-headed. He has to fight not to moan as he pants in Shinsou’s ear from where he was previously resting his head on his shoulder to watch something on the smaller blonde’s phone.

“Shin-Shinsou.” Monoma groans, trying to be quiet. “What’s happening? I feel like I’m on fire.”

Shinsou looks at him in worry before he feels something similar to when he uses his quirk and it clicks. “Shit. He said one of the words. Don’t worry, Mon, you’re okay. Just let me grab Denks and we’ll take care of you,?” He waits for Monoma’s shaky nod. “Can you walk?”

Monoma tries to push himself up, but immediately just falls limp. “How word for word did you read the list?” He whimpers quietly, trying not to alert anyone else in the room of his struggle.

“Verbatim? Wh-?” Shinsou’s eyes widen. “Please tell me you didn’t get it from one of Denki’s notebooks.”

Monoma nods helplessly. “Yeah, why?”

“Which one?” Shinsou sighs, suddenly glad Denki color codes his books so he doesn’t accidentally turn in the wrong notebook again.

“Uh, red I think?”

Shinsou sucks in a breath. “Why the hell would you grab something from there?!” He whisper-yells, cursing himself for not paying attention to what he was saying. He grabs Denki’s abandon phone to bring up the list.

When you hear ___, you will turn into a bitch in heat until you either pass out or can’t hold any more of our cum.

‘I should have listened to Dadzawa.’ Shinsou internally groans. “Why did you pick the horniest notebook? Purple or Green would have been fine, but Red is not where you go for triggers.” He hisses as he pockets Kaminari’s phone and collects the trembling Class B menace into his arms.

“I didn’t think it’d be this bad.” Monoma whines in Shinsou’s ear. “I feel like I’m going to actually go crazy if I don’t get a cock in me soon.

“For something like that, my quirk will make your body respond however it interprets it. If you had a single dominant bone in your body, even I’d probably have to bottom to get you out of this.” Shinsou sighs, signaling to a very concerned Kaminari that there’s an emergency.

“Can’t you just hypno it away again?” Monoma whimpers, trying to be sneaky about getting his hand down his pants.

“For something like this? No. It’s not really a part of the brain I’ve trained my quirk in so a reaction this strong wouldn’t just turn off.” Shinsou sighs as Kaminari catches up at the elevator.

“I got each of us a cookie dough. What happened?” Denki asks worriedly once the doors close behind them.

“Sato said one of the trigger words and we apparently both need to pay more attention,” Shinsou explains. “Remember the horny one? Well, neither of us noticed just how horny. He got it from your Red notebook.”

Kaminari’s eyes widen in horror before looking at Monoma in worry. “Oh, baby, are you okay?”

“I feel like I’m gonna die.” Monoma whimpers as he clings to Shinsou, furiously palming himself through his boxers, knowing Shinsou has him hidden from the camera. “It’s like there’s actual fire in my veins and if I don’t get a dick in me soon I might break.”

Kaminari’s face flames red as he movies closer to pet through light blonde locks. “Don’t worry we’ll take care of you, babe.” He looks up at Shinsou. “What did it say again?” His memory not the best in general.

“Front right pocket.” Shinsou sighs, lifting Monoma a little higher so Denki can fish out his phone.

Denki opens up the list and Shinsou swears he can see steam come from the blonde’s face. “This is from my breeding story.” He squeaks, looking at Monoma in horror. “If you wanted to be fucked stupid you could have just said so!”

Monoma moans loudly at the words, burying his face in Shinsou’s shoulder in embarrassment. “...I didn’t want to chicken out.”

The other two look at him fondly, Shinsou kissing his hair.

“We could have just tied you up or something, Mon.” Shinsou chuckles. “No need to torture yourself.” They watch the blonde’s face turn even redder as they walk out of the elevator. “Oh? Was that your true plan?”

There’s no response for a second before Monoma whines. “Denki might have told me about the dildo adventure, but I still wanted to be coherent.” He mumbles into Shinsou’s neck.

Kaminari burst out laughing at the other blonde’s phrasing as he opens Shinsou’s room. “Oops, guess I really am a bad influence.”

“All the time.” Shinsou chuckles. “Though what did we say about leaving notebooks in the open?” He hums as he kicks the door shut behind him, smirking at the knowing chuckle that comes from his shoulder.

Denki gulps, rubbing his neck. “Oops?”

“Color?” Shinsou hums, laying Monoma on the bed and helping him get his clothes off.

“Green,” Denki says without hesitation before his mind goes blank.

Shinsou snickers as Denki stands there slack-jawed before he looks to Monoma. “Look at that, you have a new toy. What do you need, baby?”

Monoma whines loudly now that they’re in private, already trying to get to the lube in the bedside drawer. “Inside, now. Fuck, honestly you could probably literally break my back right now and I would thank you just please!” He rambles, finally getting the bottle and squirting some on his hand, shoving two fingers in carelessly and keening at the stretch. “Please just get something in me now!”

Shinsou raises an amused eyebrow as he sits on his desk chair. “Alright. Denki, eat him out until I say stop.”

Monoma’s head snaps to the side to stare at Shinsou in horror, knowing just what the smaller blonde’s tongue is capable of and finally remembering just who his ass is in the hands of. Then he brushes his own prostate and is back to begging, whining when Denki pulls his fingers away and manhandles him to his stomach with his ass in the air.

Monoma scrambles to get a pillow under him so he’s not at such a weird angle before moaning loudly when the other’s tongue slips inside of him with the help of the lube. He claws at the sheets as Denki fucks his tongue into him, finger slipping when he can to allow him more room, and Monoma yelps when he feels a small zap at his rim.

He’s mortified to feel his cock at the feeling, and whines lowly. “Ah! Denki! Your quirk! AHHH! There! Please!”

Shinsou chuckles as Monoma tries to beg the other boy who can’t listen. “Find his prostate, and do as you wish.” He orders Denki.

Monoma has to bite the bedspread to prevent himself from screaming when Denki manages to start tonguing his prostate, occasionally zapping it while he does. “Oh fruk fruk fruk!” He chants into the bedspread, trying to grind back on the tongue in his ass as he nears his orgasm embarrassingly fast. “Cumming! Fuck Den-”

“Chartreuse,” Shinsou smirks.

Just like that Monoma’s orgasm is stopped as he cries out. “NoOoo! Shinsou! Please! Please let me cum! Please, I’ll do anything!” He whines, humping the pillow beneath him as he desperately tries to cum.

Shinsou just chuckles, leaning back in the chair as he strokes himself at the site of the normally cocky blonde crying and begging for his release. “Oh, will you now?”

“Anything!” Monoma whimpers. “Please!”

“Okay. Then don’t move until I say.” Shinsou smirks evilly. “Understand?”

“Yes, please. I’ll stay still. I won’t move. Just please let me cum.” Monoma practically sobs.

“Periwinkle.”

Monoma’s vision whites out as he cums hard across this pillow, desperately rutting into it as e rides out his orgasm, but comes back to his senses fast enough when the electrified tongue inside him doesn’t stop, and instead another finger is added. “Denkiiii~ Too much!” He whines, wanting to wiggle away, but not wanting to get punished.

“He was told to continue until I said stop remember?” Shinsou hums.

Monoma’s eyes widen as he looks at him in betrayal. “You tricked me!”

“Yup,” Shinsou smirks, digging in his bottom desk drawer. “Denki catch.”

Denki has no problem catching what is thrown at him and Monoma whimpers when he realizes it’s the dildo he mentioned earlier. The purple one Jirou had gifted Denki as a joke that definitely belongs in the monster fucker category of hentai. “You wouldn’t.” He whispers, knowing full well Shinsou will.

“Denki stop. Fuck him with it until he cums again… And turn his face to the edge of the bed.”

Denki mindlessly does as he’s told, moving Monoma so he’s facing the purple-haired boy before starting to work the massive dildo into the other twink.

Monoma cries out as he’s split open, and that’s apparently exactly what Shinsou was waiting for as he grabs light blonde hair and forces the open mouth on his cock. “

Use your safe actions if you need to.” He warns as he sinks into the blonde’s throat.

Monoma whines, gagging slightly at the intrusion but doing his best to breathe through his nose even as the breath is knocked out of him from behind. He swallows and whines around the cock, but by the time his nose is buried in purple pubes, he understands just how badly his brain has screwed him over as he sucks and swallows like his life depends on it.

Shinosou stares down at him in amusement, positive that if this was one of Kaminari’s stories, the lighter blonde would have hearts for pupils as he tries to choke himself on his cock. “God, you’re such a little cum slut aren’t you, Mon?” Shinsou smirks.

Monoma moans at the words, sucking hard as he begins to fuck back on the dildo that’s buried to the hilt in his ass. He actually whines in protest when Shinsou starts sliding out before gurgling happily when he slams back in, not a care in the world if he’s choking on it.

“Fuck, you’re so gone.” Shinsou groans, gripping blonde locks tighter to get a little more room before starting to abuse the normally mouthy blonde’s throat.

Monoma looks like he’s on cloud nine as he lets himself be used, moaning whenever the massive dildo in his ass catches his prostate and grinding back on it to chase the feeling. If he was in his right mind he’d probably wonder how the thing even managed to fit, but right now all he cared about was being full.

Shinsou looks up to check on Denki and the bulge in his pants. “Oop. Denki strip. You can fuck him after you do.”

Monoma moans loudly and Shinsou thinks he might be trying to beg around the cock shoved down his throat, but he doesn’t let up long enough to find out. Even if he wasn’t watching Denki, he would have known the exact moment he sunk into Monoma just by how the lighter blonde moaned around his dick and clawed at him. Monoma has to be gaping from the previous toy, but neither blonde seems to care as Denki gasps, sinking into him slowly.

Shinsou pulls out of Monoma’s mouth long enough to ask something. “Think you’re stretched enough?”

Monoma doesn’t even ask what for and just nods frantically while trying to get Shinsou’s cock back in his mouth by pulling on his thighs.

“Fuck, Mon. This trigger really messed you up, huh?” Shinsou hums, giving the blonde what he wants when he starts whining. “Okay, okay. I got you, baby. Calm down.” Shinsou coos, sinking back into Monoma’s mouth who hums happily. “Alright then, Denki reenact your story.”

Monoma’s eyes snap open in shock before he’s crying out around Shinsou as the other blonde starts pounding into him like a wild beast, biting and snarling included as he makes Monoma arch into the mattress.

Shinsou moans when this consequently fucks Monoma onto his cock at a much rougher speed and it isn’t long before he’s cumming down the blonde’s throat.

Monoma whines, sucking and swallowing like he nee the other boy’s cum to live and, if Shinsou didn’t know any better, he would think he might. He notices how Monoma trembles and looks down to find he had cum again and was in the process of being fucked into over sensitivity, but making no move to stop any of it as Denki did his best to lay over him as he fucked him hard and fast.

“Shi-Shinsou~?” Monoma whimpers, making grabby hands. “Not enough. Need more.”

Shinsou kneels in front of him and pets his hair as Denki cums in him, but keeps going. “Give me just a few minutes and I’ll help you, okay, Mon?”

Monoma hiccups, but nods, clawing at the sheets as Denki continues to pound his cum deeper into him. “I-Is he gonna be okay d-dOing this?”

Shinsou hums, knowing what Monoma means. “He made himself come quite a few times on that dildo when I hypnotized him so he should be okay, but I might be able to help him a little more. I’ve been working on helping to expand limits while people are under my control so allies don’t get hurt when being used as puppets. I should be able to use it here a bit.” He decides, looking back up to Denki and missing the considering look in Monoma’s eyes.

“Denki, fuck him like you’re in Mina’s Omegaverse fanfic and are in rut.” Shinsou deadpans, making Monoma laugh in surprise before immediately choking on it when Denki snarls and goes impossibly harder.

Monoma’s eyes roll back in his head as his prostate is continuously abused, moaning loudly when Denki moves back to sit on his ankles and pulls the slightly taller boy onto his lap to fuck him at that angle. He’s so out of it that he doesn’t even notice when Shinsou has to start taking advantage of Monoma’s already sloppy hole and start working his way in next to Denki.

Denki, in his hypnotized state, apparently took the rut thing a little too literally and growls at Shinsou before biting into Monoma’s shoulder possessively and making the poor boy cum again. This, luckily, also drew another orgasm from Denki as well waking him relax just long enough for Shinsou to slam in and make both blonde’s cry out.

Monoma shakes as the boys work orgasm after orgasm out of him and themselves, steadily filling him up and slowly calming him down. He does whine, however when Shinsou has to pull out from sensitivity.

“I know, Mon. I’m sorry, but unlike Denki right now, I still have to recover.” Shinsou coos, shushing the whimpering blonde.

“Let-AH!-Let me borrow your quirk?” Monoma hiccups, wanting the other boy back inside him.

Shinsou furrows his brow before realizing what Monoma’s getting at and trying to figure out how he feels about the idea. “...Just a moment. Give me a one-time trigger then release it. I still need to be aware to make sure you two stay safe.” He finally relents, kissing the blonde’s forehead. “And remind me to stop spilling quirk info to you.” He smirks.

Monoma manages to chuckle even as he moans at Denki spilling into him again. “He-Hey, ShinsOu?”

“Yeah?” Shinsou responds before his world goes black for a few seconds and he looks down to a shit-eating grin on Monoma’s face. “If you did anything unauthorized, you will get punished later...actually no you’d like that too much, you’ll just get the silent treatment for a bit.”

Monoma pouts for a moment before the smirk returns. “ShinShin?”

Shinsou about collapses with how hard the new wave of arousal hits. “Holy shit.” He pants out. “What was the exact command?”

“Fuck mE-AHH!-l-like an animal until my trigger ru-rUns out,” Monoma answers without hesitation, knowing it’s a bit more important for the one with experience to know. “Which is probably gOing to be whenever I pass out at this rA-FUCK!-rate! Oh god, Shinsou please.” He whines.

Shinsou growls low in his throat at the plea and wonders if his body decided to copy Denki as he pulls the light-haired blonde’s mouth down onto his cock and actually makes him choke on it this time.

Turns out, Monoma had a lot more stamina than he thought as he ended up leaking cum and with a full stomach to end his trigger and snap Shinsou out of his so he could stop Denki who looked at the delirious lighter blonde in shock.

By the time they were done, Monoma was drolling and blissed out, claw and bite marks covering his body and cum dripping out of his at this point gaping hole as he slurred nonsense.

“Holy shit.” Denki groans as he collapses to the side, barely conscious himself now that he was no longer mind-controlled and was just as exhausted as the other blonde after having his balls drained. He has no clue how he even managed to produce that much and wonders if he’ll be able to cum for the next month without Shinsou’s help.

“Yeah.” Shinsou pants flopped on his back with his legs hanging off the bed. “We’re turning that one off.”

Monoma just gives a shaky thumbs-up, not arguing.

“Monoma?” Shinsou asks.

“Y-yeah?” He manages to rasp before blanking out.

Shinsou undoes the trigger before giving Monoma control of his mind and body again who does pass out now that there are no lingering after-effects.

“New rule. No more sexual triggers without having a full, new kink level discussion.” Shinsou groans, trying to mentally and physically prepare himself to drag his boyfriends to the bathroom for clean-up and aftercare. He groans louder when he gets no response and finds Denki has passed out too. “Dammit, you two.”

Denki snores and suddenly Shinsou is up and taking care of them, getting them cleaned up (and out) and massaging out what are bound to be sore muscles before wrapping them up in blankets and individually carrying them to Denki’s clean bed to cuddle. By the time he makes sure there are water bottles and the cookie dough on the nightstand, he realizes Monoma did in fact add another trigger and smiles down at the smiling, bruising blonde who is hugging their resident Pikachu close in their sleep.

Both know Shinsou gets antsy when something delays aftercare so he can’t find it in him to be mad for the unauthorized trigger as he goes to take care of himself.

“Good boy.” Shinsou smiles, kissing the lighter blonde’s hair when he crawls in behind him a few minutes later. He hears a dazed but happy hum as he pulls the blanket over them before joining them in sleep.

The next morning they’d be met with a very annoyed Aizawa who had to deal with the noise complaint, but not a single one was sorry as they just smirked at the teacher who was muttering about loud blondes and Present Mic calling him a hypocrite.

Yeah, they had no regrets.

#shinmonokami #shinmono #shinkami #monokami #bnha shinsou #bnha monoma #bnha kaminari #hitoshi shinsou #shinsou x monoma x denki #denki kaminari #monoma neito #bnha #bnha denki #mha smut #smut #kinktober #kinktober 2021 #quirkplay

109 notes · View notes

vampyrsutton · 1 year

Text

ShinMonoKami~Cuckholding

Summary:

Monoma, being from a different class, doesn’t know the purple hair boy is taken and confesses. He’s not expecting to be invited in, let alone asked to help with a kink on the other blonde’s list, but sure, why the fuck not!

Ao3 Tags:

Cuckolding, Master/Slave, Kinktober, Kinktober 2022, Polyamory Negotiations, Polyamory, Hypnotism, Consensual Hypnotism, Kink Negotiation, Praise Kink, Kaminari Denki Has ADHD, Bottom Monoma Neito, Switch Monoma Neito, Top Shinsou Hitoshi, Shinsou Hitoshi Replaces Mineta Minoru, Shinsou Hitoshi is in Class 1-A, Anal Sex, Orgasm Delay/Denial, Kaminari Denki is insecure, Shinsou Hitoshi is Insecure, Monoma Neito is Insecure, Insecurities, Mild Angst, Dick riding, Voyeurism, Masturbation, After care, post-sex cuddles, Banter, dorks being adorable, Dorks in Love, Getting Together

"So, what do you think?" Monoma asks, glancing between Shinsou and the floor in an unusual bout of shyness.

Shinsou blinks slowly, having not expected this. One can see the gears turning in his head as he thinks it over, feeling bad that it's obviously making the blond's anxiety worse. Eventually, he comes to a decision, waving for Kaminari to come back over.

"...so I am dating Kaminari…" Shinsou finally answers as he throws his arm over Denki's shoulder, wincing when the copycat visibly deflates. "But." The blonde perks back up, hopefully. "What are your thoughts on poly relationships or at least three ways?"

"Wait, babe, are you asking about what I think you are?" Denki asks excitedly, looking to the other blonde hopefully. "...And you said you don't have a type." He snickers.

"Shut up," Shinsou mutters, messing up the darker blonde hair.

Meanwhile, Monoma might as well have borrowed the other's quirk as he desperately tries to get his brain back online. 'This...is not how I expected this to go???'

"You good, dude?" Denki asks, waving his hand in front of light blue eyes.

Monoma blinks, a wheeze leaving him before he shakes his head to gather his thoughts. "Sorry...not how I expected this to go...I- uh- I don't know? I've never considered it before?" He glances at Denki. "Plus Class 3-A…"

Denki rolls his eyes as Shinsou raises an amused brow. "You do know I'm 3-A, right?"

"You don't count. You clawed your way in." Monoma mumbles, ears pink.

Shinsou smirks proudly before looking at Kaminari. "You said you're okay if they only want to date one of us right?"

"Hmm? Oh yeah, babe. Not everyone is gonna vibe with both of us." He shrugs, waving it off before smirking and giving the other blonde a wink. "Though I might still play-flirt."

Shinsou smiles, kissing his forehead before looking back at Monoma. "Well, what do you think? Or would you like some time to think it over?"

Monoma is back to flabbergasted, but after a moment of thinking, slowly nods. "Uh, yeah, can I get back to you on that?"

"Yeah, take all the time you need." Shinsou hums with a lazy smile and a ruffle of the, by now shorter, boy's hair. "Just let us know."

Monoma can't seem to decide if he likes how red the insomniac can make him with such a simple action, but nods before taking the out that the bell ringing allows him to run from the attention. He does decide that he's at least allowed to flip the chuckling boy off as he makes his retreat.

~~~

"So about that offer?" Monoma mumbles in the same spot just over a week later. "I wouldn't mind trying this out." He says with a wave of his hand, trying to act more like his usual self than he was last time. "Are there any rules to know orrr?"

The two share an amused look before Shinsou nods. "Not many. Communication is of top importance. If at any time anyone feels jealous, neglected, uncomfortable, want to try a kink, or wishes to change the dynamics in any way, speak up and talk it through. Got it?"

Monoma nods, ears darkening at the mention of kinks. "Sounds easy enough. I'm known for running my mouth after all."

Shinsou nods in return before continuing. "Cuddling will usually include all parties involved, but if you're having a particularly bad day and just need one on one time, let us know."

"And if you ever need extra affection and can't find Shinsou, just come to me and I'll give you all the platonic hugs, kisses, and cuddles you need with no judgment." Kaminari grins. "And even I can see the superiority/inferiority complex you have going on so again if you need to vent it could help to have someone who can keep up with what you're saying ya know? Whatever you say will not leave the conversation. I'll keep my mouth shut."

Monoma blinks at the offer but finds himself smiling a little. He didn't really have it in him to be obnoxious about such genuine kindness. "Thank you I think?"

"It's not unusual to find the Bakusquad in a big cuddle pile so he has a lot of love to give." Shinsou chuckles.

"Do let me know if it's too much though. I have ADHD so while it lets me keep up with what you're saying during your rants, I am not the best with social cues, and you're generally aggressive around my class anyway so seriously just let me know." Denki assures.

Multiple things suddenly click for Monoma and his eyes widen. "So I'm not going to explain what I'm apologizing for, and this is the only time I will apologize to someone from A-class, but sorry for being ableist as shit."

Much to Monoma's surprise, Kaminari just grins. "No problem, dude. We've all got our issues. Thanks though."

Shinsou smiles slightly. "Doing good already. Now I know this is fast and it doesn't have to happen soon, but do consider how you want sex to work? I really only top, Kami loves bottoming, but you don't have to tell me or us right now."

The color makes it across Monoma's face this time as he looks around the abandoned hallway. "Um...switch. ...I'll get back to you on the sex."

"Wow, literally fits in perfectly." Kaminari laughs. "Hey, can I tell him what made us talk about open and poly relationships, to begin with?" He asks excitedly, grinning when Shinsou nods before looking at Monoma questioningly.

Monoma blinks but nods slowly. "Sure?"

Shinsou chuckles in a way that suddenly makes Monoma concerned, but Kaminari is already talking. "Okay, so the Bakusquad writes and draws fanfics and fanart, though I actually dabble in some original stuff and am mostly the beta reader, but anyway, one of us has this list of kinks that he finally shared with us when we convinced him to drink-"

"Wait, 3-A drinks?!" Monoma gasps.

"Really? That's what you focused on? Dude, this school doesn't even have a counselor, and we got attacked by high-ranking villains like a month into our first year and it still hasn't slowed down and will only speed up when we graduate. You were in that room with us at training camp. Can you blame us?" Denki scoffs.

Monoma winces at the memories and being so casually called out, but nods. "Fair enough...continue I guess."

"Cool, anyway. He shared the list with us and we were all going through it and there were a few I didn't know obviously so I Boogled them, and one that caught my attention was something called cuckolding." He snickers when Monoma seems to choke on his spit. "You're familiar then. Anyway. So, we've used Shinsou's quirk before during sex, and I kinda wanna be forced to sit and watch and not even be allowed to touch myself while my boyfriend fucks the brains out of someone else. You're already really vocal and I think you'd make some really hot sounds if you're interested?"

Monoma blinks at the info dump, suddenly glad he talks just as fast sometimes so could keep up easily, but his face is fully red now as his eyes shift to Shinsou then back to the floor. "I-uh- I'll think about it?"

"All I ask, dude. No pressure. Anyway, if you don't want to date me, too, can I at least try to be your friend?"

Even Monoma is finding himself weak to the complete openness of the other blonde's grin and looks to Shinsou. "How often do you actually manage to say no?"

"I'm getting better." Shinsou sighs tiredly as Denki giggles.

"Is that a yes then?" Kami hums teasingly.

"...I'll try to yell at you less I suppose." Monoma relents, sighing at the fist pump this gets from the electric boy.

"Dope! I'll leave you two alone for now then! It's Squad night and I'm already late. Later, babe!" Denki cheers, standing on his tiptoes for a kiss before looking back to the lighter blonde. "Can I hug you, dude?"

Monoma blinks, not expecting the whole thing to start so quickly but it somehow made sense for the energetic blonde. He wasn't quite ready to be touched yet though. "...a high five?"

"I'll take it!" Kaminari grins, high-fiving the awkwardly offered hand before running off after another round of goodbyes.

"I think that was the longest I've seen you be civil to one of us." Shinsou smiles softly.

"I feel like I just got spit out of a tornado," Monoma admits, staring at his slightly tingly hand and sighing when he realizes he unconsciously copied the other blonde’s quirk.

"You get used to it." Shinsou chuckles, walking closer and holding out a hand. "Would you like to go watch a movie in my room as an impromptu date? Sato has a part of the counter sectioned off for treats we're all allowed to take if you want snacks."

Monoma blinks, cheeks flushing again but nods, taking his hand. "Yeah, sure. ...I'm a bit of a talker though."

"I've been dating Denki since the beginning of second year. You're fine. We'll count it as getting to know each other more." Shinsou smiles, leading the still processing blonde away to the dorms.

~~~

Within a month of being around fairly regularly, class 3-A has grown as accustomed to Monoma's personality as his own class with some of the calmer ones actually managing conversation, all managing to keep up thanks to 3 years of keeping up with Denki.

Speaking of Denki, on a night of especially bad insecurities, Shinsou does come back from patrolling with Aizawa to find his boyfriends curled around each other as Denki runs his fingers through light blonde hair. Moving closer reveals puffy eyes and a red nose on the sleeping face, and Shinsou frowns in concern.

"Bad night. He can tell you if he wants when he wakes up, but I promised at the very beginning that I won't say shit. I think he mostly just needed a cry and some kind words though." Denki hums, shushing lightly when the copycat whimpers in his sleep.

Shinsou nods, moving to get out of his hero gear so he can join the cuddle. "Thank you for taking care of him. You know how bad I am at that."

Kaminari snorts, smiling fondly. "You are truly awful at it, but you try. Not a problem though, us loud blondes gotta stick together." He grins.

Shinsou smiles, disappearing momentarily to at least wash his face and brush his teeth before climbing into bed on the other side of Monoma and pulling the blondes close. "I'm glad you do." He hums before chuckling. "Speaking of loud blondes, Kirishima and Kuroiro have been side-eyeing me around Bakugou and Aoyama."

Denki has to hold in his laugh to not wake the sleeping boy between them. "What? Do they think you're trying to collect 'em all or something?"

"Well, I am already dating a Pikachu and a Ditto so maybe," Shinsou smirks. "The funniest thing is if they think I have the social skills or energy to steal either."

"A Pika- oh my god I hate you." Denki scoffs despite the amusement in his eyes.

"Love you too, Sparky." Shinsou snickers, closing his eyes. "Now sleep."

~~~

"Mnmm, Shin~ too much! More! Gods, please!" Monoma practically sobs as Shinsou takes him apart.

Between the purple-haired boy's sleepy personality but sinful smirks and teasing, Monoma had expected him to be either frustratingly gentle or completely break him. He hadn't prepared himself for this twisted combination that melted his mind and left him unable to think.

"Come on, Mon. I haven't even put it in yet." Shinsou hums, chuckling in a way that sends electricity down the light blonde’s spine. "You're already this sensitive?"

"Well if someone would let me cUhh-Ahhh~! Shinsou!" Any snark was cut off by whatever Shinsou just did with his tongue and fingers that left his head fuzzy and knees weak.

"You're the one who keeps saying it's too much~" Shinsou teases, rubbing his middle and index fingers against Monoma's prostate.

"Nahh~ Fuck! Don't listen to me then! Mnmm~just do whatever you want just please, Shin! Just let me cum already!" Monoma squirms, trying to get the angle he so desperately needs.

A dark chuckle seals his fate. "If you insist. Just don't complain to me when your body feels like jelly tomorrow."

He does, in fact, not complain. About anything for that matter. All Shinsou can do is smirk as Monoma's classmates ask the blonde if he's okay and all he can manage is a dopey grin.

Yeah, he's gonna be a fun one.

~~~

"So you wanna try it? For real?" Kaminari grins excitedly.

Monoma is currently looking as awkward as when he first asked the purple-haired boy out as he shifts from foot to foot, nodding shyly. "I did some reading, and don't think I would mind…"

"Midoriya reading or Bakusquad reading?" Shinsou asks with a teasing smirk.

Monoma flushes, looking at the floor. "...a bit of both?"

Shinsou just chuckles while Kami is practically vibrating with excitement.

"This is going to be so awesome. When do you wanna try this?" Kaminari grins.

"Friday I guess? Monoma shrugs. “Relax some after the exam?” Shinsou and Kami smirk at each other and Monoma suddenly fears for his ass. “I’m going to die aren’t I?”

“Don’t worry, you’ll like it.” Denki snickers through his grin before enveloping the other blonde in a hug. “Thank you thank you thank you!”

Monoma tenses, still not used to the over-affectionate blonde, but he is getting better at it as he slowly pats his back. “I may have been considering it more than I’d like to admit.”

He’s straight-up avoiding looking at the smirking purple-haired boy so doesn’t notice him move behind him to wrap his arms around him and whisper in his ear. “I can’t wait to hear what noises you’ll make, Mon. Though, maybe sometime this weekend in general so it’s a bit more of a surprise?”

Monoma squeaks, nodding slightly in agreeance before suddenly all contact is bokeh as the bell rings and he’s left standing there red-faced.

“Come on, Mon.” Shinsou hums over his shoulder. “Don’t wanna be late~”

~~~

“Hey, guys! I was returning that book to Present Mic and-”

“Sit boy.”

Denki blacks out for a second as Shinsou’s voice echos through his head before he’s suddenly sitting in the beanbag in front of his door, unable to do more than squirm. “Fuck, I love when you do that.” He groans.

As he fights to gain his bearings, he finally looks up only to throw his head back with another groan. “Fuck. You two look so good.”

“Like what you see, baby?” Shinsou teases as he pulls Monoma back onto his cock by his hair so he’s still forced to look at Denki as drool forms at the corner of his mouth. “Fuck, Mon, you’re tight. Fucking milking me aren’t you?”

“Shinsou~!” Monoma moans as he tries to hide his face. “Let me come already!”

“Nope, not until I do so unless you want to give Denki a real show and-shit!” Shinsou groans as he’s reminded that Monoma is in the hero course too when he finds himself on his back with Monoma hovering above him. “How do I keep beating you in practice?!”

“You’re distracting.” Monoma shrugs as he peers down at Shinsou with one of his shit-eating grins. “Now about that show?”

Shinsou snorts, smirking as he helps Monoma line himself up. “You were acting so shy a moment ago.”

“How-nmgmm-How else was I supposed to pull this AH! Off?” Monoma groans as he sinks down on Shinsou’s cock.

“Little minx. I’m gonna have fun breaking you in.” Shinsou chuckles lowly as he bottoms out inside once more. “Gonna fuck that smug look right off those pretty little lips.”

“Looking forward to IIIIt! Nghnn~!” Monoma taunts as Shinsou starts moving, cutting off any snippy remark.

“There you go. Just like that, Mon.” Shinsou smirks as he brings the squirming blonde down on his cock.

“Shiiiin~ What happened to putting on a show?” Monoma whines between trusts, clenching his hole so Shinsou’s head thumps back.

“Shit, Mon. Sorry, you feel too good.” He groans, loosening his grip to give Monoma some control.

“Finally.” Monoma snickers, planting his hands on Shinsou’s thighs for extra leverage as he lifts himself before grinding himself back down with a groan.

“Gods, you are going to be a brat every chance you get are- AH! -aren’t you?” The purple-haired boy scoffs jokingly as he reaches up to pull Monoma down into a panting kiss that makes the blonde whine when it changed the angle just enough to grind Shinsou’s cock into his prostate. “Oh? Did we find it, baby?” He chuckles darkly.

“Why do you have to almost growl everything like this?” Monoma whimpers as he grinds himself down. “Do you want me to come before you?”

“Hmm, maybe?” If I get to keep going when you do?” He hums with a tilt of fluffy hair and a Cheshire smirk that has Monoma considering.

“Fuck, how does he ever say no to you?” The blonde groans, outwardly acknowledging the other blonde’s existence for the first time since he opened the door.

“He doesn’t, we just work stuff out beforehand and he uses his safe words. Which you better use too if you need.” Shinsou warns, tugging at light blonde locks in a way that had the smaller moaning earlier and still holds the desired effect.

“ShIT!” Monoma moans, trembling a bit on his next glide up. “Yes, Si-shit- I mean Shinsou.”

“Oh? No, you were more than fine. Go on, baby. What is it you wanted to call me?” Shinsou prods with another harch tug that earns him a keening whine.

“Ah! Sir! Please~ You are pulling a line straight to my dick. Please, sir!” He ends up babbling as he shakily tries to continue riding the other.

“Fuuuck~” Shinsou groans as his head flops back in the pillow. You two are going to ruin me. Still wanna be on top?” A teary nod is all he needs before he’s grabbing pale hips once more and planting his feet to drive the lighter blonde to absolute madness.

“AHhh~! Shin! Sir! Fuck, please! Please! Please! PlEEE-AHH~!” Monoma rambles, crying out when Shinsou finds his prostate again and starts abusing it.

Meanwhile, during all of this, Kaminari is sitting impatiently in his beanbag, squirming and whining as he fights against the hypnosis trigger keeping him from touching his leaking cock.

“Toshiiii~!”

“Hm? Do you hear something, Mon?”

“Toshi, please!” Kami whines, desperately trying to get friction.

Shinsou glances over before focusing back on Monoma with an exaggerated sigh. “What do you think, Mon? Should he cum?”

Monoma let his head lull back to look the other blonde over before slowly smirking. “From over there maybe?”

“Sure! Please, just let me touch myself, please!” Kaminari whimpers, trying to grind against his forearm.

“Aren’t you nice?” Shinsou chuckles, eyes rolling back to the smaller boy across the room. “You can get off, but stay over there.”

Kaminari feels like he could sob as his body releases enough to let him gather his pre to take off the edge. He doesn’t notice how Monoma leans forward to whisper in Shinsou’s ear or the smirk this spreads across his tired face in response.

He doesn’t notice until there’s some shuffling before Monoma’s calling for his attention.

Denki finally manages to pry his teary eyes away from his own dick only to almost cum on the spot. Shinsou and Monoma had readjusted themselves so Kami now had an unrestricted view of where Shinsou’s cock disappeared into Monoma and how every brush against his prostate made the lighter blonde’s back arch beautifully.

“Guuuys~” Denki whimpers as the sight makes him fist his aching cock faster and bring himself closer to the edge. “Fuck, why are you two so gorgeous?” He doesn’t miss how color spreads down Monoma’s neck at the compliment.

“Does he always drop comments like that so easily?” Monoma mumbles, ears and neck flushing pink.

“You get used to it.” Shinsou chuckles in confirmation. “Do you really think I got like this on my o-Oh-own?”

“I- Ah~ You just always gave off this air of confidence.” Monoma whimpers with a squirm.

An eyebrow is raised knowingly in response. “With my quirk? Same as you, I imagine.”

“Touché.” Monoma can’t help but chuckle. “I’m guessing I have no choice in the self-love department?”

“Don’t worry, you’ll get to return the favor every now and then.” Shinsou huffs, eyes showing he’s not annoyed at Kaminari but a murder plot or two has been made in the past.

Monoma frowns, remembering an obviously fake smile trying to cover teary eyes and runny eyeliner as he’s asked for a movie night when Shinsou was on patrol weeks ago. He figured some lingering anger issues are to blame when Bakugou was at his door with a Pikachu plush the next morning, refusing to make eye contact with anyone as he shoves the plush into Denki’s grateful arms. “I plan tOh! ShIN~!” Monoma cuts off with a whine.

“Sorry, Mon. Feelings later. Let’s finish this scene for him, hm?” Shinsou prompts as he tweaks one of the blonde’s pretty pink nipples. “You still good?”

“Mnmm~ Yes, sir~” Monoma moans, trembling now as he gets close to the edge. “Close…”

“I am too, baby.” Shinsou pants, snapping his hips where he thinks the lighter blonde’s prostate is, and smirking at the moan he gets. “How's he looking back there?”

Monoma whimpers as he glances over his shoulder just in time to see Kaminari tense and cum all over his hand, chair, and floor as electric gold eyes roll back in his head and he moans loudly before falling slack, panting hard.

He’ll unpack the way his own dick twitches and his stomach flutters at a later time he decides.

“Beautiful.” Is what he says instead, turning scarlet when he realizes. “I- uh- I mEA~! SHIN~!” He cries out when his realization is cut off by a warm hand stroking his cock. “SHIN~ I- cu-Ah~ Cumming! I’m-”

“Come on, Mon~” Shinsou coos, suddenly much closer to the blonde's ear than he had realized. “Cum for me, sweetheart”

Monoma has no clue where the whine that rips itself from his throat comes from, but the next thing he knows, he’s cumming hard across their chests and fighting to not blackout as he screams. “SHINSOU!”

“Fuck~ Sweetheart, huh? Fuck, so good. You’re doing so good for me, sweetheart. Fuck, you’re squeezing me just right. In or out, sweetheart?” Shinsou rambles, forehead dropping to rest on a pale shoulder as he strokes Monoma through his orgasm.

“In, Shin. Fuck, cum in my please~” Monoma whines, doing his best in his delirious state to help milk the tired boy to completion. “Please, Shin~”

There’s a low groan as Shinsou goes rigid and Monoma whimpers when hot cum spills into him. “Fuck.” Is the only gruff response he gets.

Shinsou continues fucking Monoma through their highs until he falls back and starts making grabby hands to Kaminari. “Come here, baby.”

Monoma sees movement out of the corner of his eye and watches as Denki makes his way over, washcloth from the bowl on the desk in hand as he helps with basic clean-up for the night.

“Fuck you two. That was unfairly hot.” Kaminari groans as he finishes wiping off their chests. “Thank you. Thank you for agreeing to that, Monoma.”

Monoma just hums, offering a squeeze to his hand as acknowledgment, too tired and embarrassed for more.

“Am I okay to clean down there, or would you prefer you or Toshi?”

He thinks for a second. “I can get it. …Thank you for asking.”

“Of course!” Denki grins as he passes over the freshly dampened cloth. “Do you want this side to yourself, or can I snuggle you, too?”

Monoma looks at him in confusion now as he shyly cleans up. “It’s your room? Your bed?”

“I don’t want to make you uncomfortable.” Denki shrugs, the goofy, post-orgasm grin never leaving.

“Denki, you just saw our boyfriend split me in half. Get your twink ass down here, du-dork!” Monoma huffs out in a laugh, catching himself last second after observing how the other wince when dumb related nicknames are made even jokingly.

Kaminari either doesn’t notice or doesn’t want to unpack it right now as he returns the cloth to the bowl before koala-clinging himself to Monoma who Shinsou big spoons in return. “Yay! I don’t know if it’s from some of the quirks you have to copy but you’re really warm!” He cheers.

“Okay, I thought I was going crazy. Right?” Shinsou finally chimes in with a chuckle. “Much warmer than my poor living habits keep me.”

Monoma doesn’t know why but he feels the need to hide in the darker blonde fluff in front of him. “‘M not that warm.” He mumbles, embarrassed for some reason.

The other two chuckle, letting the topic drop as Shinsou pulls the blanket over them. “We’ll get cleaned up properly later.” He yawns.

“Yes, sir.” The sleep blondes mumble in response as they all snuggle closer to each other.

“...Damn, is this gonna be a thing now?” Shinsou snorts quietly.

“That better be one of the Pikachus from the corner, Shinsou, I swear to the gods,” Monoma warns when he feels something rubbing against his ass. “Denki, how are you not dead? He’s insatiable.”

Kaminari just giggles as he pulls the other blonde closer. “Don’t worry, Monoma. I’ll sacrifice myself to the horny house cat.”

“Ah, yes. Such a noble sacrifice when I’m the one who had to work up to matching your stamina.” Shinsou scoffs dryly.

“Gods, I’m gonna die. Sleep! Both of you! Get a different room if you’re gonna go again.” Monoma huffs, burying his face in darker blonde locks.

“So much for it being my room.” Denki giggles teasingly.

“Sleep!”

“Yes, Mon!” The other two chuckle.

For all the teasing, it’s not long before they’re all asleep in a tangle of limbs and relaxed smiles on their faces.

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